System overview
1.5 System properties
SIRIUS Innovations
36 System Manual, 01/2011, A8E56203870002-03
1.5.9 Application monitoring
The current monitoring relays, which enable intelligent protective functions to be easily
implemented within the application, are a central component of the innovations made to the
SIRIUS modular system.
Increasing numbers of customers require application monitoring in addition to motor
protection. Overload protection (based on I²t measuring/calculation) provides information on
the motorized load, but it does not necessarily allow for conclusions to be drawn regarding
the correct execution of processes within the machine. 2- or 3-phase current monitoring with
SIRIUS 3RR2 current monitoring relays facilitates the direct monitoring and protection of the
application.
① Application monitoring
② Motor protection
Figure 1-8 Application monitoring
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